Furnace



Nov. l, 1927.

A. A. BRUDER FURNAGE I SMM@ Nov. l, 1927.

A. A. BRUDER FURNACE Filed July 31. 192.5

5 sheets-Sheet 2 6 S 4. -iilllt 27,; A 7. e 2 3 am "e416 Nov. l, 1927.

A. A. BRUDER Fummcn Filed July .'51, 1925 5 Sheets-Sheet 5 Nov. 1, 1927.

A. A'. BRUDER Fummc Filed Ju1y31, 1925 5 Sheets-Sheet 4 gimen/to@ A. A. BRUDER' Nov. l, 1927.

FURNAGE Filed July 31. 1925 5 Sheets-Sheet 5 45 matter.

' Patented Nov. Y1, `1927.

Unirs- FUR-NACE.

VIn my PatentsNos; 11,368,983,'dat ed Feb.

15, 1921; 1,419,011, dated June6,`1922; and

chamber, and'meansextends into the upper i .end `ofthe down flue to produce aV draft therein so'that products of combustion are causedto pass intoftlie fire box and drum. i In my Patent No. 1,541,108, dated June'9, 1025,` there. is disclosed a grate that may be advantageously used .in connection with the -furnace, vand in Vthis 'application there. are .y `certain improvementsthat may be characteriiedasifollows.

f First, theffurnace'y is provided with novel :air intake members and water 'heaters constructively arranged sothat vaY supply y of lwater may be expeditiously and economically heated by absorbing heat from hot point'members of the furnace and the air supply members are'fdisposed to have'a cool-I ing efect on the hot point members, where-v r.by saidhot'point members are protected to acerta-in extent from burning out under the .Y

'intense heatv condition maintained' at' times inthe furu ace. These 'water heating and air A supplying members are removable from the ,Y Ifurnace without materially disturbin'g'other ,.35 Yparts of.` the furnace structure, such being y desirablein oase either of vthe members should be defective.` Y V Second, in the operation of'a furnace fof the type A' disclosed in my prior patents I io 'found an accumulationl of soot and other' matter at certain points,.and my improved "furnacey includes a down pipeand damper arrangement thatpositively prevents the accumulation or pocketing of Vsoot and other Third, ,an improved y.Venturi member Vis `employed forl producing a draft in the down fiue, said .member now forming the upper part of a con'ibustion chamber, and this 'V50 .memben as well as other parts 'of the fur-k nace' have been designed and constructed to facilitate yassembling "the furnace parts and to provide a more durable, easily controlled and efiicientfurnace than disclosed 5.5, ,in my prior patents.

bei 18,

Application Ainea Juiy 31,1925. serial No.' 47,254.'`

My invention will'be hereinafter described by aidof the drawings, wherein f Figure 1 lis ya Vvertical iloi'igitudinal @sectionalview ofthe.furnjaoe.;"v y Y Fig. 2 is a vertical cross vsectional 'view taken on' they line :II-H vof Fig.l f1; Fig. 3'is ahorizontals'eotional Viewitaken onJthe line VII--Ill'of Fig. 2;V n

Fig. 4 is an elevation `of a. portion-ofthe furnace front wall;

5 is a plan of the furnace ;Y L.' ,'Fig iszan elevation of a 'portionrof the furnace rear wall; f yj v .Fig 7 isa longitudinal ysectional viewiof :ai-r supply and water heatingmembers;

',Fig. 8 is a perspective view ofztheisame;

Fig. 9 is a horizontal sectional ,view :o-'f the Afurnace on a smaller scale and taken `onor structure.

x -My lfurnace beingiof the hotai-rtypefnec essarilywincludes fa easing'or Asuitable enclos. ,i

sure 1 having cold air inlet. ducts l2 and warm outlet flues '3.' V

In the. easingl is the furnacerproper-.fconsisting 'offa base or -ashpit which-extends to' the front wall 5 of` the casingl` and isn provided :with the usual doorway; 6 normally closed bypa door?? In this ash'pitmay be placed a grate, preferably ofthe typer disclosedin my Patent No. 1,541,108 mentioned above, the grate includinga 4grateframel 8, rookable 'grate units 9 supported by vthe frame-8, individual rockers 10 in `front aof box 112 having its `bottom formed by the grate units9 vandthe top of-asaid fireb'o'x' 9o. s the casing wall frrockingithe grate units, l l

grate structureV :for

opens into a coinbustioirohamber The fire box12 isformed withdiverging or .an- A i gularlydisposed drum connectionsj 14 .and-l -seated on the upper ends of these drum/,cn-v

nections1'4 are side drums 15. which' have the upperlfends .thereof closed andf the'coniie Y vThe tire box 12 and the drum connections 14 have a commonrear wall 19 and a common front wall 20. In the rear wall 19 are seats 21 and 22 and openings 23 and in the front wall are seats 24 and 25 and openings 26. In the seats 22 and 25 are placed detachable channel members 27 which have the outer walls 28 thereof cooperating with the drum connections 14 in supporting the drums 15.v rllhe inner walls 29 of the channel members 27 cooperatewith the rear wall 19 and the front wall 2O in supporting a het air casing 30 which may be braced relative to they combustion chamber 13 by spacing members 31.` The hot air casing 30 has its side walls connecting the walls 19 and 20 and said casing has an arched top wall 32 a portion of which extends below the branches i 17 of the exhaust member 18.

Mounted on the combustion chamber 13, within the hot airV casing 30 is a Venturi member 33 having side walls 66 extending from the combustionv chamber 13 to the top wall 321o`f the hot air casing 30 and the walls '66 cooperate with the side walls of the combustion chamber 13`and the casing v30 in forming vertical hot air flues 34. The rear ends of the side walls 66 of the Venturi member 33 are formed with wings 35 inset towards each other relative to walls 66, there being a gradual restricted passage from the front portion of the Venturi member to the rear portion thereof, and said wings extend into a down flue connection 36 forming part of the hotlair casing 30. rEhe casing 30 includes a rear wall A37, as an extension of the rear wall 19 and at Vthe upper edge of the wall 37 may be suitable supports or spacers 38 for the wings 35 of the Venturi member. On account of the wing formation of the side walls 66 of the Venturi member 33 the greater partof the side walls 66 is of less Vlength than the side walls of the casing, as

Vbest brought out in Fig.9, lso that there may be side passages 39 establishing communicacation between the hot air casing 30 and the down flue connection 36. As a result 'of this constructive arrangement of parts hotV air passing upwardly in the casing 30 and through the passages 39 into the down flue connection 36 induces a draft between the wings 35, there being somewhat of a siphonic action which withdraws smoke and gases from the combustion chamber 13 into the down flue connection 36.

The arched'top wall 32 of the hot'air casing 30 is extended to form a damper wall 40 of the down flue connection 36, said damper Wall having a large opening 41 communicatingwith a connection 42 of an exhaust flue 43, which also communicates with the exhaust member 18. The exhaust flue 43 communicates withV the atmosphere and in said exhaust flue may be placed a conventional form of damper 44. See Fig. 2..

rlhe arched top wall 32 extends forwardi ly to form part of a fuel inlet connection 45 supporteduby the front wall 2O and the front wall 5 and communicating with a doorway 46 normally closed by a door 47. Obviously the door 47 may have air inlet openings and it is through the medium of the inlet connection 45 that all kinds of fuel may be placed in the combustion chamber 13.

'The damper opening 41 of the down fine connection 36 is closed by a normally inclined wing damper 48 connected t0 angeperating rod 49 suitably supported from the arched top wall 32 and extending through the casing front wall 5 so as to be manually actuated. i

The down flue connection 36 communicates with the top of a down flue 50 having its lower end inclined into communication with the base or ash'pit 4 of the furnace and in consequence of this down flue smoke and gases entering the connection 36 will enter the ash pit 4v and pass upwardly through the grate units 9 into the bed of lire maintained on the grate `in the fire box 12. n

At the juncture of the fire box 12 and the drum connections 14 are air inlet members and water heating members. The air inlet members are composed of inner walls 51V- and outer walls 52, said outer walls having the upper edges thereof joining the channel members 27 and said inner vwalls having the upper edges thereof joining the side walls r'of the combustion chamber 13. The lower edges of the walls 51 and 52 join hot'point members 53 vand these hot point members support hollow7 triangular shaped water heating members 54 braced from the walls 51 and 52 by spacing members 55. The hollow triangular shaped water heating members 54 join the hot point members by apertufed web portions 56v and the apertures not only permit of air circulating in the lower portions of the air heating members7 but afford a weakened portion more susceptible to fracture than other partsvofthe water heating members, consequei'itly if these water heating. members are fractured the fracture occurs without leakage of water. which is desirable in connection with the furnace vincluding-a water back or water rif) liu)

tending through openings in the front Wall 5 of the'casing 1,.

'Assuming that a 'irei's bui-lt on the grate 29 'aindwfuel supplied lth'ereto (from the combustion'chamber 13, which serves as a magjazine,`the 'operation' of the furnace may be considered substantially "as follows:

Air 'entering vtheconduits 58 and 64 passes 'th'rou'ghthe openings'QS andf63 intoth'e'air heating members formed by the 'channel Y members 27, and .Walls 51 and 52 and thefhot l'point members' 253.V The air entering the openings jand f6?) reaches the lower porn r'tions ofthe "air heating tmernb-ers'so as to be brought into'contact with' the hot point members '3jand the'lowergp'ortions ofthe `Walls 51and '52; "In other Words, the air `cannot c immediate'lypass upwardly-intotheflues 34,

bt :must impinge against the vWalls 51 and haar@ `4the meneer bung' heated. y 'The hor air ,passingjupward-ly Vinfthe sid'efflues 34 'ienters "the lpassages 39fand produces a draft rearwardly in the upper' 'portion' of the Venturi-member -33. forming the upper portionfof "the combustion chamber 113,cfonse` guently ,any smoke Vor unburned gases above the vf ueljin the eombi'istionl chamber is drawn into the downfflue connection'36 vand comto pass through th burned gases passfupwardly l'through 'the' mingles with the hotair. V 'Ihe s IadmiXtures are v carried doWnWardlyft-hrough Vthe down fluef5'0 intothe baseor ash f-pit'4 ofthe lfur- Vnace,and'fimpinge-against the be'droffire on the grate unit`s-9 .eithertofbe 'consumed'or xbed of fire -a'n'd increase .the 'burning intensity of the ffire bed. `Unconsumed smoke-and gasesmay pass through the fuel in the combustion chamber, but since resistance is encountered, the smoke and undrum connections 14, drums`15, branches 17 into. the: exhaust member A18 and vout through vlthej.ezhaust flue 48.y yIt is obvious th'atthis circulation y causes all inflammableor combustible matterto -r'eachfthe fire bed :and as there is a constant .draft inthe drum connections 14jthel fireqbe'd will be'jvery much {alive-.at ,the hot.,point :members 53, which it Wilhbe noted fare somewhat heayy in .order to withstand the intense heat. The conditioncf .the :fire fjinproXimity to these hot 'f point members may be observed by tWyer members 65 connecting the casing Wall 5 tok the ffurna'ce @Wall 20. `Theintense? heatiat the hot point members 531'oauseslthe` walls f51and thi-shot -airl commingling With smoke 'and unburned gases that lends combustion' Alto the bedA of fire when lpassing upwardlyther'ethrough. gainythelheated air i'mpinging' against the hot Water heating Ine1nb`ersi54V and 'cooperates with the Water -in said-members in preventing f excessiveheating of the members A52,1%0 be heatedso cthatfair is thoroughly lheated before 'entering' the f1uesf3'4rand it is 54, and itis obvious Athatthe Water may'I-be t thoroughly heated when passing said Waiter heating *membersf In y:other Words, there is a' co-operation in 1 these parts 'of the 'furnace 'that not only insure a hot-y Water Isupply, but increase `the vefficiency of the 'furnace as aburneroffall :kindsof fuel, particularly'fuel low in combusti'le matter,

When fuel is tobe placed inthe combustion .chamber 13l by opening' thedoorv47,fthe damper 4:8 is vfirst'opened and this vaccomplishes 'two results. First, with the door 47 and the 'damper '48 open, I therefis a draft vacross the combustion IChamber' and :smoke through and gases are carried jinto'tl'1e1eXhau st 'flue-43,

temporarily yretarding. the 1 dra-ftl action inv the fire box. @peiling the f damper 48 prevents the smoke and gases',from'fbeingllemitted, at the open doorway '46, and -anysoot or'jothe'r 1 matter .not consumed 'by the rfire fand Iwhich u might accumulate on vthe damper 44851s `dis-'j charged intoY the downfflue 50 into Itheash,

pit 4 from where it may be removed from `timeto'time,l n Y Y The lair lin leaving the :air -heating jmem# bers 4and passing upward-lyv into? the casing l SOhelps toc'ool 'the Wallsfo'f th'e'co-mbus'tion chamber'andfwhen l the lfurnace is properly fired` the Walls 19 and 20, casing "30, channel members Q7, 'connections 14, drums 15,-d0'Wn pipevO and other-partsof-the'furnaceradif 'ate heat to the extent :that the interiory of the casing '1 thoroughly heated, thus :insu'rin-g a supply of fhot .air lfor the flues 3 of'the'casing. l

I Edesire to 'direct' attention to the construction of vthe Water and air heatin'gmem-- bers which .are removable from the'front Wall 20 of the'furnacefbyremoving the air conduits'6`k4. The .parts `ofthese Waterlandla'ir heating 'members are joinedfby cement or vinterlocking r connections so asV vto be. reasonably tight and v'yet permit of" expansion land contraction incident to the operationbf 'the furn'acel Should `anything happento Tthese y Water Vand air heating members the injured 4parts canfbe.y easily' ireplac'edf Without tear- 'ing down the entire furnace and'l O 'therparts of the furnace have ybeenicons'tr'ucte'd with thesamethought invieyv.` "With proper'piping in connection `With the 'members '54"th`er'e V is no'chance-of Water leakage or hood-ing of 'the furnace, because as 'previously {poited out' if there any Weakness aboutthe Water laol heating members 54 it occurs at the web portions `56 thereof without any water escap- A adapted to receive air, each member includinga hot point member, side walls and achannel member, and water heating members in said air heating members and adapted to have water circula-ted therethrough.

2.V The combination. of a casing, a furnace in said casing, air heat-ing members at the sides of said furnace only and extending from the front of said furnace to the rear thereof, conduits connecting the ends of said air heating members to said casing to afford straight air passages through said casing, and -a water heating member extending through said air heating members and conduits, said water heating member being enlarged within said air heating-members.

The combinat-ion called for in claim 2,

@wherein said furnaceincludes a combustion chamber having vhot air fines at. the sides thereof with the lower ends of said flues comn'iunicating with said air heating members. y v

4'. The combination called for in claim 2, wherein said air and water heating members are substantially triangular in cross section at the sides of said furnace with said members having-v integral lower portions.

5. An air heating member for a furnace having a fire box kand a' drum withrthe lower end of the drum communicating with the 'fire box, said air heating member having a relatively thick hot` point portionk at the juncture of said drum and fire box, said air heating member receiving air at its ends and discharging air at its top, and a water heatingmember extending through said air heating member.

A 6. vA furnace as called for in claim l, wherein said channel members cooperate with said fire box in providing air outlet passages at the sides of said fire box. v

7. In afnrnace wherein smoke and gases are conducted from the upper partuof the combustion chamber to a fire box in the furnace, and wherein a draft is induced for conducting suchjsmoke and gases means supplying warm air for said draft purposes said means comprising air heating members at' the sides ofy saidfire box and communicating. with the upper portion of said combus- "tion chainber, a casingv at the sides of said combustion chamber and a Venturimember prising a Venturi member on said comousl tion chamber, said Venturi member having wings extending into said down flue. a casing at the sides of said combustion chamber cooperating therewith and with said Venturi member in forming side lines communiv eating with said down fine, and air heating members communicationg with said side flues and supplying air to said flues.

9. A furnace as called for in claim 8, wherein said air heating membersare disposed at the sides of said fire box and receive air at the front andrear sides of said furnace. y n

' 10. In a hot'air furnace wherein a grate supports a fire Vvbox supplied with a fuel from a combustion chamber having al down flue conducting smokeand gases f from the top of the combustion chamber to said fire box, and wherein drums communicate with the fire box for the exhaust of unburned matter i-air heating members at the juncture of said drums with the lire box, said members supplying heated air to induce a draft down said down flue and'up said drums.

ll. A furnace as called for in, claim 10, Y

wherein said air heating members are water cooled. l

12. A furnace having a fire box, a down flue adapted to conduct smoke and gases from over said fire box to. under said fire box, a Venturi member extending into said.y down flue, an air heating member having a'hot point in said fire box, and aA casingestablishing communication ybetween said Venturi member and said air heating member so that heated lair may enter saidv down flue to en- 16. A furnace as called for in claimv 12,

wherein said air heating memberis vformed by a channel member, side walls, and a member providing the hot point inpsaid fire box.

'17. An air heating member for a furnace having a irefbox and a drum with the lower end of the drum communicating with the fire box, said air heating member being at the juncture of said drum vand lire box, and

having a relatively thick hot point portion.

18u An air heating member as called for in claim 17, and a water heating member supported in said air heating memberby thel hot pointportion thereof.

19. A Water cooling member'for a furnace having a lire box anda drum with the lower end of the drum communicating with the i lire box and a water conduit at the juncture of the drum with the fire box, said water cooling member inclosing the water conduit and affording an air passage from one portion of the conduit to another portion thereof, and means for regulating the passage of air through said member to control theytemvperature of water in the water conduit. y

20. A water cooling member as called for in claim 19, wherein said member has a relatively thin hot point portion exposed to said fire box. i v

21. A water cooling member as called for in claim 19, wherein said member has a top rair Voutlet at the side 'of the fire box.

ing said water conduit and providingan airV passage lengthwise of said member sov that air may circulate around the water conduit, said member having a top air outlet` at the side of 'the fire box, and means controlling the passage Ofai'r through said member.

. In testimony whereof I affix my signature. Y

' kALBERT A. BRUDER(V 

